Paper formation and weight indicator



' 1,634,344 July 5 1927 R. A. STEFFEN PAPER FORMATION AND WEIGHTINDICATOR Filed May 19. 1926 Inventor Altzorney Patented July 5, 1927.

UNITED STATES RAYMOND A. STEFFEN, OF HAMILTON, OHIO;

PAPER FORMATION AND WEIGHT TNDIOATOR.

Application filed. May 19, 1926. Serial R0. 110,195.

This invention relates to a device for in- This invention comprehendsthe provision l6 dicating paper weight in formation and for permittingthe accurate control of paper weight.

In the present practice in the art of paper making the operator of apaper machine, for

instance a Fourdrinier paper machine, in operating the Fourdrinier wireand the sluice gate or outlet gate in the flow box controls the speed ofthe wire and the flow of pulp or stuif from the flow box in such a waythat from experience, paper of a desired weight could be manufacturedwith variable approximations.

The manufacture therefore, of paper of a predetermined weight issubstantially variable and wholly dependent upon the guessing of theoperator in connection with the operation of the sluice gate and theFourdrinier wire, and the accuracy of result is governed entirely by theskill of the operator and at best the results produced are variablethrough substantially wide limits.

This results in View of the fact that the stock flowing from the flowbox onto the Fourdrinier wire varies in consistency almosttcontinuously,at one timebeing relatively thick, providing heavy spots in the paperand at anot-her time being relatively thin in view of the greaterproportion of water making thinner and less weight paper, and also fromvariations in the speed of the wire.

In order to make the paper uniform, it is necessary under this varyingcondition of the flow of paper stock from the flow box, to continuallyvary the speed of operation of the Fourdrinier wire or vary the openingof the sluice gate to permit a greater or ess amount of stuff to flow onthe Fourdrinier wire. This again presents difiiculties in obtaining agood" grade of paper in View of the fact that if the stock travelsfaster than the Wire, due tobeing watery, the stock rolls over and overin flowing over the wire which produces cloudy paper, while if thewiremoves faster than the stock, the same rolling occurs in the oppositedirection, producing the same result. 4 v

The control of paperweight is therefore amatter which at present iswholly guess work on the part of the operator of the paper machine, anddependent entirely upon his skill obtained by experience.

of means whereby this guess work in controlling the weight of the papermay be entirely eliminated and the control made positive and accurate inorder that the weight of the paper may be made substantially .uniform'throughout by the proper and immediate control of the flow of stock orstuff fromv the flow boxand the speed of the Fourdrinier scription, andin the claims directed to the preferred form of the invention, it beinunderstood that there are various ways 0 carrying the same into effectwhich are clearly within the scope of the inventlon as herein set forth.

' In the drawing forming a part of this application: 7 Figure 1 is abottom plan view of the device showing the parts in assembled relatlon ifor accomplishing the results produced by this invention. I

Fig. 2 is a side elevation of the construction as shown in Fig. 1, inwhich parts are broken away and shown in section 1nd1cating theapplication of the device tora Fourdrinier wire for operation to producethe results by which control of the paper weight is obtained.

Referring to the drawings, 1 and 2 respectively, indicate a pair oftachometers of any well known type of construction used 1n the art andfound most desirable for the pur-.

poses which are suitably supported in the bracket member 3 having thelaterally extending ends 4 suitably bifurcated and adapted to receivetachometers 1 and 2 1n the manner as illustrated in Fig. 2, in whichthey are clamped through the compressing action of the set screws .5which draw the bifurcated ends 4 of the member 3 together and rigidlysupport the tachometers therein.

. -Each tachometer is provided with a rotatable shaft 6 while a stubshaft 7 is mounted on the tachometer .at 2, which is formed with areduced extension 8 on which the idler wheel 9 is rotatably mounted.

I The shaft 6 of tachometer 2 receives a suitable paddle wheel 10 whilethe shaft 6 of tachometer 1 has a drive wheel 11 rigidly mountedthereon.

The device is appliedinoperation as illustrated in Fig. 2. in which theFourdrinier wire is indicated diagrammatically at 12, while the pulpflowing on the wire is indicated at 13. The idler 9 and the drive wheel11 will have bearing and driving contact with the Fourdrinier wire 12,while the paddle 10 is of such a size that it will not engage theFourdrinier wire but will be subject to the direct action of the pulpflow 13 on the wire 12. In this way, the tachometer-indicated at 1 willbe driven in accordance with the speed of the Fourdrinier wire 12 whilethe tachometer indicated at 2 will be operated through the operation ofthe paddle wheel 10 by the flow of pulp 13 over the wire the Fourdrinierwire while the hand 17 ope erated by the tachometer 2 registers on theproper production 'of a predetermined stock on the Fourdrinier wire.

dial 18 the speed or flow of stuff or paper As a result the operator ofthe paper machine compares the two results and in this way the speed ofthe wire and of the stufi may be controlled in order to obtain theproper synchronization for producing paper having a uniform weight. 4

It will be understood that in the operation of this device, should thepaper stock become watery and thin and consequently flow sub stantiallyfaster than heavy or thick stock which condition results in the pulp boxrather'than on the Fourdrinier wire, that this device will indicate thischange in the consistency of the pulp in view of the fact that thethinner pulp containing more water will flow considerably faster thanrich pulp or stuff which is thick and therefore flows substantiallyslower. 1

This change in consistency of the stock will therefore be immediatelyindicated by this device in order that the speed of the Fourdrinier wiremay be varied to obtain the proper synchronization of flow and weight ofpaper.

Having thus described my invention, what I claim as new is 1. Thecombination of two rotary shafts mounted inadjacent relation, a drivewheel on one of said shafts, a fluid actuated means on the other shaft,and means mounted in associated relation having driving connection withthe shafts for indicating the relative speed of the shafts.

2. Paper weight control indicating means having in combination, a pairof aligned rotary shafts, means operably mounting said shafts inassociated relation, drive means for one shaft, fluid actuated meansdriving the other shaft, and means for indicating the speeds of saidshafts.

3. Paper Weight control indicating means having in combination, asupport, a pair of indicating devices mounted in associated relation insaid support, and independent means for operating said indicatingdevices,

one of said means being formed for fluid actuation.

4. Paper weight control indicating means having in combination, a pair.of independent rotary shafts, means'for indicating the speed of rotationof said shafts, a bracket member mounting the shafts, a drive wheel onone shaft, an idler rotatably carried by the bracket member, and a fluidactuated device on the other shaft, said drive wheel and idler operablysupporting the device.

5. Means for indicating paper weight for mation on a movable pulpcarrying member comprising in'combination, a pair of independentindicating means, and means for operating said indicating means, one ofsaid indicating means registering the speed of the carrying member andthe other indicating means registering the flow of the paper pulp, saidindicatingv means cooperating to 1nd1- cate the formation of paper in apredeter mined manner.

6. Means for indicating pa" or weight formation, wherein a paper mac ineincludes a movable Fourdrimer" wire, adapted to receive a controlledflow of-paper pulp material, comprising means for indicating the speedof operation of said Fourdrinier wire and means for indicating the flowof said p 7. In combination, means operable by the pulp flow in a papermaking machine for in dicating the rate of said flow, means operable bythe pulp carryin mechanism for indicating the speed of said mechanism,and means supporting the first two mentioned means in associatedrelation whereby paper weight formation may be obtained in apredetermined manner.

In testimony whereof I afiix my signature.

. RAYMOND A. STEFFEN.

